Double sliding door lock



Oct. 10 1967 F J. RUSSELL ETAL DOUBLE SLIDING DOOR LOCK Filed June 28, 1965 INVENTORJ 05.55

Keep cf nited States Patent Ofiice 33,345,838 Patented Get. 10, 1967 .ABSTRACT OF THE DISCLOSURE A sliding door lock having a plunger axially movable in a housing to project a lock bolt at its inner end out of the housing into locking position. A catch carried by the plunger latches it to the housing in locking position and a key-controlled lock plug is rotatable in the plunger to disengage the catch for movement of the plunger outwardly into unlocking position by a biasing spring. The plunger is moved into latched, locking position by a non-keyed pressing movement.

This invention relates, in general, to locks, and more particularly to an improved plunger type, key-actuated lock suitable for double sliding doors, windows, and the like closure members.

Looks for double sliding doors, windows, and the like, as heretofore known, were usually constructed with more or less conventional sliding bolts or pivotal hook members adapted to make latching engagement with detents or recesses formed in the door jamb or window frame, as the case may be. Such locking devices were unduly complicated and expensive to manufacture, lacked the desired strength, durability and security, and were excessively time consuming in installation.

It is accordingly a principal object of this invention to provide an improved lock mechanism particularly adapted to use in connection with double sliding doors, windows, and the like closure members.

It is another object of this invention to provide a sliding door or window lock of improved strength and security.

It is another object of this invention to provide an improved double sliding door or window lock of improved design, operating characteristics, and durability.

It is a still further object of this invention to provide a lock mechanism particularly adapted to sliding closure members, the installation of which is facilitated over those heretofore employed.

These and other objects, advantages, and features of novelty will be evident hereinafter.

In the drawing, which illustrates a presently preferred embodiment of the invention, and in which the same or similar reference characters designate the same or similar parts throughout the several views; we show:

FIGURE 1 is an isometric view, in elevation, of the principal components of the lock mechanism of the invention, illustrating in phantom lines a typical mode of installation thereof in a double sliding closure assembly. FIGURE 2 is a top view of the same look mechanism and installation shown in FIGURE 1, showing the double sliding closure assembly in horizontal section.

FIGURE 3 is a longitudinal sectional view similar to FIGURE 2, but with exterior portions of the lock broken away approximately as indicated by line 33 in FIGURE 4a, to expose internal parts thereof to view.

FIGURE 4a is a cross-sectional view of the lock mechanism assembly taken as indicated by line 4-4 in FIGURE 2, showing the positions of certain of the internal elements thereof when in latched condition.

FIGURE 4b is a cross-sectional view of the lock mechanism assembly similar to FIGURE 4a but with re elements shown in unlatched position.

FIGURE 5 is a side elevational view of the lock mechanism assembly, with external portions thereof broken away to expose internal elements thereof to view.

FIGURE 6 is an exploded perspective view of the lock mechanism; and

FIGURE 7 is a side elevational view, in reduced size, of the lock mechanism, opposite to that shown in FIGURE 5, and as taken approximately from line 77 of FIG- URE 2.

. Apparatus Referring first primarily to FIGURES 1 and 2, the lock assembly shown generally at 10 is by way of illustration, shown in a typical installation within the marginal portion of one of two double sliding door members, the door members being shown in phantom lines at 12 and 14 in FIGURE I, and in longitudinal section in FIGURE 2.

Referring next primarily to FIGURE 6, the principal components of the lock assembly 10 are a lock case, shown generally at 16, and a lock plunger or cylinder assembly, shown generally at 18.

The lock 16 comprises a hollow cylinderical portion 20, open at one end 22, and closed at the opposite end 23 by means of a crosswise-extending, flat faceplate 24. The hollow cylindrical portion 20 of the lock case 16 and the faceplate 24 are staked together by means of a pair of integral, arcuate tongues 26 and 28, which extend from the adjacent end 23 of the hollow cylindrical portion 20, through correspondingly shaped slots formed in the faceplate 24, with outer ends of the tongues 26 and 28 peened or riveted over. The wall of the hollow cylindrical portion 29 of the lock case 16 is deformed inwardly at one point adjacent its closed end 23 to provide in the bore thereof an inwardly projecting, buttress-shaped catch detent 30, having an axially inwardly facing detent shoulder 32, formed by the edge of an axially outwardly sloping latch surface 34. The axially inwardly facing detent shoulder 32 of the catch detent 30 is adapted to make one way latching engagement with a latch pawl or catch member 36 carried by the lock cylinder assembly 18, as hereinafter more fully described. The faceplate 24 is formed with a circular opening 38 therethrough, eccentric to the longitudinal axis of the hollow cylindrical portion 20 of the lock case 16, for axially sliding reception of a solid, cylindrical lock bolt 40, carried by and forming an extended portion of a cylindrical key plug 46 carried by the lock cylinder assembly 18, as also hereinafter more fully described.

The beforementioned lock cylinder assembly 18 comprises a substantially solid, metal, cylindrical, key plug housing 17, having an outside diameter making a relative- 1y free, coaxial, sliding fit within the bore of the hollow cylindrical portion 20 of the lock case 16, as best shown in FIGURES 2, 3, and 5. The cylindrical key plug housing 17 is formed with an eccentrically positioned, key plug bore 42 extending axially therethrough from end to end, as best shown in FIGURE 3. The key plug bore 42 is formed at its outer end with a shallow counterbore as shown at 44. Rotatably contained within the key plug bore 42 is an elongated, generally cylindrical key plug 46 which includes at its axially inner end the aforementioned cylindrical lock bolt 40. The key plug 46 is formed at its outer end with an annular retainer head portion 48, of slightly increased outside diameter, such as to make a free rotational fit within the beforementioned counterbore 44. The key plug 46 is also formed at an intermediate section thereof, and defining the axially outer end of the beforementioned lock bolt 40, with an annular snap ring groove 50, containing a retainer snap ring 52. The annular retainer 'head portion 48 of the key plug 46, and the annular re- '1 =13 tainer snap ring groove 52 serve to position and retain the key plug 46 axially within the key plug bore 42 in the cylindrical key plug housing 17, while at the same time permitting angular rotational movement of the key plug 46 relative to the cylindrical key plug housing 17.

The key plug 46 and associated portion of the cylindrical key plug housing 17 are of more or less conventional design, the key plug 46 having drilled therein a plurality of axially spaced-apart, radially extending tumbler bores 54 intersected at their inner ends by a longitudinally extending key slot 56, with each of the tumbler bores 54 slidably containing a cylindrical tumbler element as shown at 57, and the cylindrical key plug housing 17 having drilled therein a corresponding number of correspondingly, axially spaced-apart, radially extending pin bores 58, each slidably containing a spring-pressed cylindrical tumbler actuating pin 59. When the key plug 46 is in locked angular position relative to the cylindrical key plug housing 17, as shown in FIGURE 4a, and in the absence of insertion of a proper key in the key slot 56, the tumbler bores 54 in the key plug 46, and the pin bores 58 in the cylindrical key plug housing 17, are located in radially extending, coaxial alignment with one another, as shown in FIGURE 4a, with the tumbler 57 and tumbler actuating pin 59 therein in end-to-end abutment with each other and in such radial positions as to block rotational movement of the key plug 46 relative to the cylindrical key plug housing 17. When a suitable key is inserted into the key slot 56, the tumbler element 57 and tumbler actuating pin 59 are shifted to such radial positions as to unblock rotational movement of the key plug 46 relative to the cylindrical key plug housing 17 and thereby to permit the key plug 46 to be rotationally moved to an unlocked angular position, as illustrated in FIGURE 4b.

The key plug 46 is also formed at an intermediate section, adjacent the beforementioned annular snap ring groove 50, with an external, transversely milled cam slot 60, forming thereby at the bottom of the cam slot 60 a cam surface 62 eccentric to the rotational axis of the key plug 46, as best shown in FIGURES 4b and 4b.

The key plug housing 17 is formed adjacent its axially inner end and in radial alignment with the cam surface 62 on the key plug 46, with a transversely directed pawl retainer slot 64 in which is pivotally contained the beforementioned latch pawl or catch member 36. Pivotal retention of the latch pawl 36 in the pawl retainer slot 64 is detachably accomplished by means of a springpressed, pawl shaft 66 which is axially slidably contained within an axially extending eccentrically positioned bore 68 drilled into the axially inner end of the key plug hous-' ing 17 and transversely intersecting the pawl retainer slot 64. The outer end portion of the pawl shaft 66 is formed with an integral pivot pin 69 of reduced diameter, thereby forming an outwardly facing annular shoulder 70. The pivot pin 69 extends through a correspondingly diametered pivot hole 72 in an intermediate portion of the latch pawl 36, with the annular shoulder 70 pressed into engagement with one side of the latch pawl 36 by means of a coil spring 74 contained in the inner portion of the bore 66. One end portion of the pawl retainer slot 64 is intersected by a cutout depression 75 formed in the cylindrical exterior surface of the key plug housing 17, thereby exposing a latching end portion 78 of the latch pawl 36, and providing a recess in the key plug housing 17 to accommodate the hereinbeforementioned buttress-shaped catch detent 30, when the lock cylinder assembly 18 is in its most inward and locked position within the hollow cylindrical portion 20 of the lock case 16, as best shown in FIGURE 3.

A spring socket 80 is drilled transversely into the key plug housing 17 from the bottom of the pawl retainer slot 64, for containing a pawl-actuating coil spring 82, the outer end of which spring 82 bears, under compression, against an inner edge portion 84 of the latch pawl 36 adjacent the beforementioned latching end portion 78 thereof. The pawl-actuating coil spring 82 acts under compression to urge the latch pawl 36 rotationally in r. counterclockwise direction about the pivot pin 69, as viewed in FIGURES 4a and 4b, such as to maintain the opposite end edge surface 86 in following contact with the beforernentioned cam surface 62 of the key plug 46.

The inner end of the cylindrical key plug housing 17 is provided with an eccentrically located, axially directed, spring socket 83 containing the inner end of a latchactuating coil spring 90. Extending coaxially, slidably into the outer end of the latch-actuating coil spring 96, and into the spring socket 88, is a spring guide pin 92 having a rounded head 94 on the outer end thereof, the rounded head 94 being normally pressed into and maintained in forceful engagement by the latch-actuating coil spring 90, with the adjacent inner surface of the faceplate 24 when the apparatus is in assembled, operative condition, as best shown in FIGURE 3.

A longitudinally extending guide slot 96, of limited length, is cut through the wall of the hollow cylindrical portion 20 of the lock case 16, and a retatiner screw 98 is threaded into a threaded hole 99 in the key plug hous ing 17, the head 100 of which retainer screw 98 makes guiding, sliding engagement within the guide slot 96 to restrain the key plug housing 17 and lock case 16 from rotation relative to one another, and to limit the relative axial sliding movement thereof between locked and unlocked positions.

Operation The installation of the lock apparatus in the mode illustrated in FIGURES 1, 2, 3, 5, and 7 and the operation thereof is as follows:

A hole 102 is first drilled through the thickness of the double sliding door member 12, into which the hollow, cylindrical portion 20 of the lock case 16 is inserted from the inner side, the inner surface of the door member 12 being also suitably recessed adjacently surrounding the hole 102 to fiushly receive the faceplate 24, as best shown in FIGURES 2 and 5. The lock case 16 is retained in such position by means of a pair of wood screws 106 and 108 which extend through countersunk holes 110 and 112, respectively, provided in the opposite end portions of the faceplate 24. In such installation of the lock apparatus in the door member 12, only the outer end of the lock cylinder assembly 18 and the cylindrical key plug 46 are opera tively exposed to the exterior.

The inner edge and corner of the door member 14, which is normally positioned adjacent and in blocking alignment fith the lock bolt 40 when the door members 12 and 14 are in closed, locked position, as illustrated in FIGURES 1 and 2, is provided with an angular shaped, strike plate 114 which is held in place by means of a pair of Wood screws, one of which is in view at 116 in FIG- URE 2. p

In the assembly of the components illustrated in FIG- URE 6, the lock cylinder assembly 18 is inserted coaxially into the open end 22 of the hollow cylindrical portion 20 of the lock case 16 and forced inwardly thereinto against the opposing force of the latch-actuating coil spring 90, to an axial position at which the latching end portion 78 of the latch pawl or catch member 36 engages and rides pivotally inwardly over the sloping latch surface 34 of the catch detent 3t and snaps outwardly in front of the detent shoulder 32 under the action of the pawlactuating coil spring 82, thereby latching the lock cylinder assembly 18 in its most axially inward, locked position within the lock case 16. In such most axially inward position, the lock bolt 40 extends out through the circular opening 38 in the faceplate 24 to a position which is engageable with the strike plate 114, as illustrated in FIG- URES 1 and 2, and thereby serves to block opening movement of the door members 12 and 14 relative to one another in the directions indicated by the arrows 118 and 120. Following this, the retainer screw 98 is installed through the guide slot 96 into the threaded hole 99 provided therefor in the key plug housing 17, thereby affect;

members 12 and 14 to slide in an opening direction relative to one another in the directions indicated by the arrows 118 and 129, a proper key is inserted in the key slot 56, and the key plug 46 is rotated thereby from the angular position shown in FIGURE 40 to that shown in FIGURE 4b. Such angular rotation of the key plug 46, acting through the cam surface 62 upon the follower end edge surface 86 of the latch pawl 36 causes the latch pawl 36 to pivot about the pivot pin 69 from the position shown in FIGURE 4a to that shown in FIGURE 4b, which results in retraction of the latching end portion 78 of the latch pawl 36 from engagement with the detent shoulder 32 of the catch detent 30, thereby releasing the lock cylinder assembly 18 to move axially outwardly under the force of the latch-actuating coil spring 90 to the position shown in broken lines 18a in FIGURES 2, 3, and 7, which is the limiting position permitted by the movement of head 100 of the retainer screw 98 in the guide slot 96. In the latter outermost position of the lock cylinder assembly 18, the lock bolt 40 is retracted through the circular opening 38 to a position at which its outer end is flush with the outer surface of the faceplate 24, as indicated by broken lines 40a in FIGURE 3. The lock bolt 40 is thus retracted out of a position engageable with the strike plate 114, thereby freeing the door members 12 and 14 to slide relative to one another, as indicated by arrows 118 and 120 in FIG- URE 1, to an open position.

Following the releasing of the lock, as hereinbefore described, when it is desired to restore the lock apparatus to a locked condition, the rotational force on the key is released, permitting the key plug 46 to rotate from the angular position shown in FIGURE 419 back to the angular position shown in FIGURE 4a, such return rotational movement of the key plug 46 being effected by the force exerted on the cam surface 62 thereof by the follower end edge surface 86 of the latch pawl 36 by reason of the pivotal force exerted thereon by the pawl-actuating coil spring 82. Following such return of the key plug 46 to the position shown in FIGURE 4a, and after the closure members 12 and 14 are again positioned in their relatively closed positions, the lock cylinder assembly 18 is then manually pushed axially inwardly relative to the lock case 16 in opposition to the force of the latch-actuating coil spring 90 until the latching end portion 78 of the latch pawl 36 again moves over the sloping latch surface 34 of the catch detent 3t) and snaps outwardly into latching engagement with the detent shoulder 32, at which latter position the lock cylinder assembly 18 is again retained and thereby locked in its most axially inward position relative to the lock case 16, with the lock bolt 40 again extending from the facepate 24 into a position engageable with the strike plate 114, as shown in FIGURES l, 2 3, and 5. It is to be understood that the foregoing is illustrative only, and that the invention is not limited thereby, but includes all modifications thereof within the scope of the invention as defined by the appended claims.

What is claimed is:

1. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

releasable catch means automatically actuable when said plunger member is moved to said first axial position, for locking said plunger member at said first axial position;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger member by means of a key, said catch means operating independently of the lock member to lock the plunge member;

and means responsive to such movement of said lock member and independent of the key except for moving the lock member for releasing said catch means to unlock said plunger member for axial movement from said first axial position to said second axial position.

2. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between a first axial position and a second axial posi tion in said housing;

means preventing rotational movement of said plunger member; v

releasable catch means automatically actuable when said plunger member is moved to said first axial position, for locking said plunger member at said first axial position;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger member by means of a key, said catch means operating independently of the lock member to lock the plunger member;

means responsive to such movement of said lock member and independent of the key except for moving the lock member for releasing said catch means to unlock said plunger member for axial movement from said first axial position to said second axial position;

and a lock bolt member movable between extended and retracted positions relative to said housing by movement of said plunger member between said first axial position and said second axial position, respectively.

3. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

releasable catch means automatically actuable when said plunger member is moved to said first axial position, for locking said plunger member at said first axial position;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger by means of a key, said catch means operating independently of the lock member to lock the plunger member;

means responsive to such movement of said lock member and independent of the key except for moving the lock member for releasing said catch means to unlock said plunger member for axial movement from said first axial position to said second axial position;

and a lock bolt member integral and coaxial with said lock member and extending axially but eccentrically of each plunger member, said lock bolt member being moved between extended and retracted positions relative to said housing by movement of said plunger member between said first axial position and said second axial position, respectively.

4. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between limits in said housing;

means preventing rotational movement of said plunger member;

a catch member carried by said plunger member and movable relative to said plunger member between a first position engageable with said housing to fix said plunger member at a predetermined axial position relative to said housing, and a second position nonen-gageable with said housing to free said plunger member for suchaxial sliding movement relative to said housing;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger member by means of a key between first and second positions;

and means responsive to such movement of said lock member between its said first and second positions and independent of the key except for moving the lock member, to move said catch member between its said first and second positions respectively, thereby to permit said plunger member to be fixed axially as aforesaid, and to free said plunger member for said axial movement, respectively.

5. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between limits in said housing;

means preventing rotational movement of said plunger member;

a catch member carried by said plunger member and movable relative to said plunger member between a first position engageable with said housing to fix said plunger member at a predetermined axial position relative to said housing, and a second position nonengageable with said housing to free said plunger member for such axial sliding movement relative to said housing;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger member by means of a key between first and second positions;

means responsive to such movement of said lock member between its said first and second positions and independent of the key except for moving the lock member, to move said catch member between its said first and second positions respectively, thereby to permit said plunger member to be fixed axially as, and to free said plunger member for said axial movement, respectively;

and a lock bolt member carried by said plunger member and movable thereby between extended and retracted positions relative to said housing.

6. In a lock, apparatus comprising:

a housing having a stop shoulder;

a plunger member mounted for axial sliding movement between limits in said housing;

means preventing rotational movement of said plunger member;

a pawl member pivotally carried by said plunger member and pivotable relative to said plunger member between an extended position latchingly engageable with said stop shoulder to fix said plunger member at a predetermined axial position relative to said housing when said plunger member is moved axially to said predetermined axial position, and a retracted position nonengageable with said stop shoulder to free said plunger member for such axial movement relative to said housing;

a cylindrical, key-controlled lock plug mounted in said plunger member and rotatable relative to said plunger member by means of a key between first and second rotational positions;

and cam means in said plunger member rotatable by such rotation of said lock plug and operatively engaging said pawl member, whereby rotation of said lock plug between its said first and second rotational positions moves said pawl member between its said extended and retracted positions respectively, thereby to permit said plunger member to be fixed at said predetermined axial position as aforesaid, and to free said plunger member for said axial movement, respectively.

7. In a lock, apparatus comprising:

a housing having stop means therein;

a plunger member mounted for avial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward said second axial position;

a catch member carried by said plunger member and movable relative to said plunger member between a first position latchingly engageable with said stop means when said plunger member is moved to said first axial position to retain said plunger member at said first axial position in said housing in opposition to said resilient means, and movable to a second posi tion of disengagement from said stop shoulder to release said plunger member -for axial movement, by said resilient means, from said first axial position to said second axial position;

resilient bias means constantly urging said catch member to move toward its said first position;

a key-controlled lock plug mounted in said plunger member and movable relative to said plunger member by means of a key between first and second positions;

and means responsive to movement of said lock plug to its said second position, to move said catch member in its said second position against said bias means, thereby to release said plunger member for said axial movement by said resilient means from its said first axial position to its said second axial position.

8. In a lock, apparatus comprising:

a housing having stop means therein;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward said second axial position;

a catch member carried by said plunger member and movable relative to said plunger member between a first position latchingly engageable with said stop means when said plunger member is moved to said first axial position to retain said plunger member at said first axial position in said housing in opposition to said resilient means, and movable to a second position of disengagement from said stop means to release said plunger member for axial movement by said resilient means from said first axial position to said second axial position;

resilient bias means constantly urging said catch member to move toward its said first position;

a cylindrical, key-controlled lock plug mounted in said plunger member and rotatable relative to said plunger member by means of a key between a first rotational position and a second rotational position;

and means responsive to such rotation of said lock plug from its said first rotational position to its said second rotational position to move said catch member in opposition to said bias means from its said first position to its said second position respectively, therebyreleasing said plunger member for said axial movement by said resilient means from its said first axial position to its said second axial position.

9. In a lock, apparatus comprising:

a housing having stop means therein;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward said second axial position;

catch means movable relative to said plunger member between a first position engageable with said stop means when said plunger member is moved to said first axial position to lock said plunger member at said first axial position in said housing in opposition to said resilient means, and movable to a second position of disengagement from said stop means to release said plunger member for axial movement by said resilient means from said first axial position to said second axial position;

resilient bias means constantly urging said catch means to move toward its said first position;

a key-controlled lock plug mounted in said plunger member and movable relative to said plunger member by means of a key between first and second positions;

means responsive to movement of said lock plug from its said first position to its said second position, to move said catch means from its first position to its said second position against said bias means, thereby releasing said plunger member for said axial move- 'ment by said resilient means from its said first axial position to its said second axial position;

and a lock bolt member carried by said plunger member otfset from its axis and positioned such as to extend from said housing when said plunger member is in its said first axial position, and to be retracted relative to said housing when said plunger member is in the said second position.

10. In a lock, apparatus comprising;

a housing having stop means therein;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward said second axial position;

a catch member carried by said plunger member and movable relative to said plunger member between a first position engageable with said stop means when said plunger member is moved to said first axial position to retain said plunger member at said first axial position in said housing in opposition to said resilient means, and movable to a second position of disengagement from said stop means to release said plunger member for axial movement by said resilient means from said first axial position to said second axial position;

resilient bias means constantly urging said catch member to move toward its said first position;

a cylindrical, key-controlled lock plug mounted in said plunger member and rotatable relative to said plunger member by means of a key between first and second rotational positions;

means responsive to such rotation of said lock plug from its said first rotational position to its said second rotational position, to move said catch member against said bias means from its said first position to its said second position, thereby releasing said plunger member for said axial movement by said resilient means from its said first axial position to its said second axial position;

and a lock bolt member carried by said plunger member and extending from said housing when said plunger member is in its said first axial position, and retracted relative to said housing when said plunger member is in its said second position.

11. In a lock, apparatus comprising:

a housing having a stop shoulder;

a plunger member axially slidable in said housing be tween a first axial position and a second axial position;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward its said second axial position;

a pawl member pivotally mounted in said plunger member and pivotable relative to said plunger member between a first pivotal position and a second pivotal position;

resilient means constantly biasing said pawl toward its said first pivotal position;

said pawl member being thereby automatically lockingly engageable with said stop shoulder to fix said plunger member at its said first axial position, in opposition to said resilient means, when said plunger member is moved to its said first axial position;

a cylindrical, key-controlled lock plug mounted in said plunger member and rotatable relative to said plunger member by means of a key between first and second rotational positions;

cam means carried by said lock plug and operatively engaging said pawl member whereby rotation of said lock plug from its said first to its said second rotational position pivots said pawl member from its said first pivotal position to its said second pivotal position in opposition to said resilient bias means, whereby said pawl member is withdrawn from engagement with said stop shoulder to free said plunger member for axial movement, by said resilient means, from its said first axial position to its second axial position.

and a lock bolt member carried by and axially movable with said plunger member such as to extend from said housing when said plunger member is in its said first axial position, and to be retracted relative to said housing when said plunger member is in its said second axial position.

12. In a lock, apparatus comprising:

a housing having a stop shoulder;

a plunger member axially slidable in said housing between a first axial and a second axial position;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward its said second axial position;

a pawl member pivotally mounted in said plunger member and pivotal relative to said plunger member between an extended pivotal position and a retracted pivotal position;

resilient means constantly biasing said pawl toward its said extended pivotal position;

said pawl member being thereby automatically lockingly engageable with said stop shoulder to retain said plunger member at its said first axial position, in opposition to said resilient means, when said plunger member is moved to its said first axial position;

a cylindrical, key-controlled lock plug mounted eccentrically in said plunger member and rotatable relative to said plunger member by means of a key between first and second rotational positions;

cam means carried by said lock plug and operatively engaging said pawl member whereby rotation of said lock plug from its said first to its said second rotational position pivots said pawl member from its said extended pivotal position to its said retracted pivotal position in opposition to said resilient bias means, whereby said pawl member is withdrawn from locking engagement with said stop shoulder to free said plunger member for axial movement from its said first axial position to its second axial position;

and a lock bolt member coaxially carried by and axially movable with said lock plug such as to extend from said housing when said plunger member is in its said first axial position, and to be retracted relative to said housing when said plunger member is in its said second axial position.

13. In a lock, apparatus comprising:

a housing;

a plunger member mounted for axial sliding movement between a first axial position and a second axial position in said housing;

means preventing rotational movement of said plunger member;

releasable catch means automatically actuatable when said plunger member is moved to said first axial position, for locking said plunger member at said first axial position;

a key-controlled lock member mounted in said plunger member and movable relative to said plunger member by means of a key, said catch means operating independently of the lock member to lock the plunger member;

means responsive to such movement of said lock member and independent of the key except for moving the lock member for releasing said catch means to unlock said plunger member for axial movement from said first axial position to said second axial position;

and means biasing said lock member for return movement to its original position after movement by the key, when the key is released.

14. In a lock, apparatus comprising:

a housing having a stop shoulder;

a plunger member axially slidable in said housing between a first axial position and a second axial position;

means preventing rotational movement of said plunger member;

resilient means constantly urging said plunger member to move toward its said second axial position;

a pawl member pivotally mounted in said plunger member and pivotal relative to said plunger member between an extended pivotal position and a retracted pivotal position;

resilient means constantly biasing said pawl toward its said extended pivotal position;

said pawl member being thereby automatically lockingly engageable with said stop shoulder to retain said plunger member at its said first axial position, in opposition to said resilient means, when said plunger member is moved to its said first axial position;

a cylindrical, key-controlled lock plug mounted eccentrically in said plunger member and rotatable relative to said plunger member by means of a key between first and second rotational positions;

cam means carried by said lock plug and operatively engaging said pawl member whereby rotation of said lock plug from its said first to its said second rotational position pivots said pawl member from its said extended pivotal position to its said retracted pivotal position in opposition to said resilient bias means, whereby said pawl member is withdrawn from looking engagement with said stop shoulder to free said plunger member for axial movement from its said first axial position to its second axial position;

and a lock bolt member coaxially carried by and axially movable with said lock plug such as to extend from said housing when said plunger member is in its said first axial position, and to be retracted relative to said housing when said plunger member is in its said second axial position, said resilient bias means rotating said pawl member into its extended pivotal position and said lock plug into its said first rotational position when the key operating said lock plug is released when said plunger member is in its said second axial position.

References Cited UNITED STATES PATENTS 1,873,462 8/1932 North -100 1,951,418 3/1934 Jacobi 70360 2,098,189 11/1937 Kistner 70100 2,320,177 5/ 1943 Golden et al. 70-370 2,370,862 3/1945 Johnstone 70369 3,102,411 9/1963 Friedman 70-100 FOREIGN PATENTS 264,065 4/ 1929 Italy.

BOBBY R. GAY, Primary Examiner. 

13. IN A LOCK, APPARATUS COMPRISING: A HOUSING; A PLUNGER MEMBER MOUNTED FOR AXIAL SLIDING MOVEMENT BETWEEN A FIRST AXIAL POSITION AND A SECOND AXIAL POSITION IN SAID HOUSING; MEANS PREVENTING ROTATIONAL MOVEMENT OF SAID PLUNGER MEMBER; RELEASABLE CATCH MEANS AUTOMATICALLY ACTUATABLE WHEN SAID PLUNGER MEMBER IS MOVED TO SAID FIRST AXIAL POSITION, FOR LOCKING SAID PLUNGER MEMBER AT SAID FIRST AXIAL POSITION; A KEY-CONTROLLED LOCK MEMBER MOUNTED IN SAID PLUNGER MEMBER AND MOVABLE RELATIVE TO SAID PLUNGER MEMBER BY MEANS OF A KEY, SAID CATCH MEANS OPERATING INDEPENDENTLY OF THE LOCK MEMBER TO LOCK THE PLUNGER MEMBER; MEANS RESPONSIVE TO SUCH MOVEMENT OF SAID LOCK MEMBER AND INDEPENDENT OF THE KEY EXCEPT FOR MOVING THE LOCK MEMBER FOR RELEASING SAID CATCH MEANS TO UNLOCK SAID PLUNGER MEMBER FOR AXIAL MOVEMENT FROM SAID FIRST AXIAL POSITION TO SAID SECOND AXIAL POSITION; AND MEANS BIASING SAID LOCK MEMBER FOR RETURN MOVEMENT TO ITS ORIGINAL POSITION AFTER MOVEMENT BY THE KEY, WHEN THE KEY IS RELEASED. 